Tension device for spinning and twisting frames



April l, 194l F. K. HENDRICKSON 2,237,953

TENSION DEVICE FOR SPINNING AND TWISTING FRAMES Filed April 8, 1940 2Sheets-Sheet l Apr@ 1,

F. K. HENDRCKSON TENSION DEVICE FOR SPINNING AND TWISTING FRAMES FiledApril 8, 1940 2 Sheets-Shea?I 2 @WMV @JAW Patented Apr. 1, 1941 UNITEDSTATES les TENSION DEVICE FOR SPINNING AND TWISTING FRAMES ApplicationApril 8, 1940, Serial No. 328,488

(Cl. 57-l05) Claims.

This invention relates to spinning and twisting frames and moreparticularly to the mechanism for driving the spindles in such machines.

It is customary to arrange rows of spindles along the opposite sides ofspinning and twisting frames and to drive these spindles by tapes orbands from centrally located pulleys or drums. Commonly two spindles oneach side of a frame are driven by a single tape.

Special devices are required for tensioning the driving tapes, and thesedevices must be operative with the cylinder revolving in eitherdirection, as the direction of rotation will be reversed according tothe desired twist in the yarn.

It is the general object of my invention to provide improved tensioningdevices for spinning and twisting frames, so designed that they can beused to advantage on narrow frames where previously known tensioningdevices could not be used.

A further object is to provide tensioning devices which are simple inconstruction and compact in arrangement and which are convenient andreliable when in use.

My invention further relates to arrangements and combinations of partswhich Will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawings, in whichFig, 1 is a transverse sectional elevation of parts of a twisting frameembodying my improvements;

Fig. 2 is a diagrammatic plan view showing the usual arrangement ofspindles and tapes;

Fig. 3 is an enlarged side elevation of my improved tensioning device;and

Fig. 4 is a plan view, looking in the direction of the arrow 4 in Fig.3.

Referring to the drawings, I have shown parus oi a twister framecomprising a frame member I5 mounted on adjustable stands and supportingspindle rails |2 and longitudinally extending frame bars |4 and |5. Arectangular rod I1 is also supported on the frame members l0 and extendslongitudinally of the frame for a purpose to be described.

A series of driving pulleys 2Q are mounted on a driving shaft 2|supported in bearings 22 on the frame members lll. The shaft 2| ispositively rotated in either direction by any suitable driving means,not shown and forming no part of my present invention.

Spindles are mounted on the spindle rails |2 and are provided withdriving pulleys or whirls 25 engaged by tapes 3|). The usual arrangementof spindles is as shown in Fig. 2, with a single tape 3l! passing aroundthe driving pulley 2 and engaging the whirls 26 of two spindles on eachside of the machine.

Spools S are mounted on the spindles 25, and separators 32 may besupported on the bars |5 to prevent interference between the yarns ofadjacent spools.

The parts thus far described, with the exception of the rectangular bar|1, are or may be of usual commercial construction. I will now describethe improved devices which I provide for automatically tensioning thetapes and taking up slack, regardless of the direction in which thepulleys 2|) are rotated.

For this purpose, I provide guide pulleys 45 and 4| (Fig. 3) mounted onhangers 42 and 43 which in turn are pivoted at 44 and 45 on brackets 46and 41 which are recessed to fit snugly over the rectangular supportingbar |1 and which may be secured thereon by clamping screws 48.

Weighted levers 50 and 5I are pivoted at 52 and 53 on the brackets 46and 41 respectively. The extended ends 54 and 55 of the levers Sil and5| are engaged by the overhanging end portions 56 and 51 of the hangers42 and 43. Fixed stops 6|) and 5| on the brackets 46 and 41 arepositioned for engagement on their upper sides by lugs 62 and 63 on thelever extensions 54 and 55, and on their lower sides by lugs 54 and 65on the hangers 42 and 43.

The brackets 46 and 41 are forked as indicated in Fig. 4, so that thehangers 42 and 43 and the levers 59 and 5| are very rmly supported. Itwill also be noted by reference to Figs. 3 and 4 that the parts are somounted and arranged that a minimum transverse space is required, a1-though the pulleys 40 yandv 4| rotate in the same plane and guide thebelt 3i) in said plane.

Assuming that the pulley 20 is rotating anticlockwise or in thedirection of the arrow a in Fig. 3, the portion of the tape 3|] at theleft of Fig.

3 will be under driving stress and will swing the guide pulley 40 andhanger 42 to the left to raise the weighted lever 5|) until the lug 52on said lever 5i) engages the Xed stop 50, which stop determines the xedrunning position of the pulley lll when the driving pulley 25 isrotating anticlockwise.

In the meantime, the pulley 4|, which is not under driving stress, willbe swung to the left by its weighted lever 5| until it firmly engagesthe tape 35 and automatically takes up any slack in said tape. Suchmovement to the left, however,

is not ofA such extent as to cause the lug 65 to engage the stop 6Iunder usual operating conditions.

If, however, the tape 3i) should break, both pulleys 40 and 4| wouldswing toward the center of the machine until the lugs 6ft and 65 on thehangers 42 and 53 engage the lower sides of the stops 60 and 6I. Thepulleys are thus retained approximately in running position, so thatreplacement of the tape 3l! may be conveniently effected.

When the direction of rotation of the pulley is reversed, the pulley lilmoves to the right to a xed position, and the pulley 46 takes up theslack.

I have thus provided very convenient and compact tensioning defvicesI bywhich a tape, as

3i), may be guided and kept from running looseor slack, regardless ofthe direction of rotation of the driving pulley.

While I have shown only a single set of spindles, driving pulleys andtensioning devices in the drawings, it is common to provide these partsin two banks, with a second set of spindles, driving pulleys andtensioning devices mounted on upward extensions of the frame members I8.The construction, so far as the belt guiding and tensioning devices areconcerned, is, however, identical with the construction shown in Figs. 3and 4 and already described.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. Tension devices for spindle-driving tape in a spinning or twistingmachine comprising a supporting structure mounted in said machine, apair of swinging hangers pivoted on said structure, one at each side ofthe longitudinal center line of said machine, a guide pulley pivoted oneach hanger, weighted levers for said hangers pivoted onsaid'st'ructure, yone at each side of said center line and between theassociated hanger and said `center line, and each hanger and itslassociated lever having coacting extensions which render said partseffective to move the assocaited pulley to take up slack when engaging anon-driving run of said tape.

2. Tension devices for spindle driving tape in a spinning or twistingmachine comprising a supporting bar extending longitudinally of saidmachine, supporting structure mounted on said bar, a pair of swinginghangers pivoted on said structure, one at each side of said bar, a guidepulley pivoted on each hanger, weighted levers for said hangers pivotedon said structure, one

'structurehaving xed stops to limit outward movement of each pulley whenengaging a driving run of said tape.

3. Tension devices for spindle-driving tape in a spinning or twistingmachine comprising a supporting bar extending longitudinally of saidmachine, supporting structure mounted on said I bar, a pair of swinginghangers pivoted on said structure, one vat each side of said bar, aguide pulleyV pivoted on each hanger, weighted levers for said hangerspivoted on said structure, one at each side of said bar Aand between theassociated hanger and said bar, each hanger and its associated leverhaving coacting extensions which render said parts effective to move theassociated pulley to take up slack when engaging av non-driving run ofsaid tape, and said structure having xed stops engaged by said leverextensions and thereby limiting outward movement of either puley whenengaged by a driving run of said tape.

4. Tension devices for spindle-driving tape in a spinning or twistingmachine comprising a supporting bar extending longitudinally of saidmachine, supporting structure mounted on said bar, a pair of swinginghangers pivoted on said structure, one at each side of said bar, a guidepulley pivoted on each hanger, weighted levers for said hangers pivotedon said structure, one at each side of said bar and between theassociated hanger and said bar, each hanger and its associated leverhaving coacting extensions which render said parts eiiective to move theassociated pulley to take up slack when engaging a non-driving run ofsaid tape, and said structure having fixed stops engaged by said hangersand limiting movement of said pulleys towardl each other if suddenlyreleased by breaking of the tape.

5. Tension devices for spindle-driving tape in a spinning or twistingmachine comprising a supporting bar extending longitudinally of saidmachine, supporting members mounted on said bar, a pair of swinginghangers pivoted on said members, one at each side of said bar, a guidepulley pivoted on each hanger, and levers pivoted on said membersbetween said hangers and said rod, said levers crossing above said rodand each having a weighted end portion beyond said rod, and said leversand hangers having extensions coacting between their pivots, wherebyeach weighted lever acts to swing the guide pulley on the associatedhanger yieldingly toward the weighted end of said lever.

6. Tensionv devices for spindle-driving tape in a spinning or twistingmachine comprising a supporting bar extending longitudinally of saidmachine, supporting members mounted on said bar, a pair of swinginghangers pivoted on said members, one at each side of said bar, a guidepulley pivoted on each hanger, and levers pivoted on said membersbetween said hangers and said rod, said levers crossing above said rodand each having a weighted end portion beyond said rod, and said leversand hangers having extensions coacting between their pivots, wherebyeach weighted lever acts to swing the guide pulley on the associatedhanger yieldingly toward the weighted end of said lever, said members,hangers and levers being identical, and said pulleys being mounted torotate in the same plane.

7. A tension device for a spindle-driving tape in a spinning or twistingframe comprising a supporting bar extending longitudinally of themachine, brackets mounted in adjacent pairs on said bar and extendingtherefrom in opposite directions, swinging hangers pivoted on saidbrackets, a guide pulley pivoted on each hanger, and a separate weightedlever for each pulley pivoted on each bracket, each hanger andassociated lever being mounted on the same bracketand having abuttingand coacting extensions which render said parts eiective to move theassociated pulley only to take up slack when engaging a non-driv ing runof said tape.

8. A tension device for a spindle-driving tape in a spinning or twistingframe comprisinga supporting bar extending longitudinally of themachine, brackets mounted in adjacent pairs on said bar and extendingtherefrom in opposite directions, swinging hangers pivoted on saidbrackets, a guide pulley pivoted on each hanger, and a separate weightedlever for each pulley pivoted on each bracket and extending above andacross said supporting bar, each hanger and associated lever beingmounted on the same bracket and having abutting and coacting extensionswhich render said parts effective to move the associated pully only totake up slack when engaging a nondriving run of said tape.

9. A tension device for a spindle-driving tape in a spinning or twistingframe comprising a supporting bar extending longitudinally of themachine, brackets mounted in adjacent pairs on said bar and extendingtherefrom in opposite directions, swinging hangers pivoted on saidbrackets, a guide pulley pivoted on each hanger, and a weighted leverpivoted on each bracket, each hanger and associated lever being mountedon the same bracket and having coacting extensions which render saidparts effective to move each pulley to take up slack when engaging anondriving run of said tape, and each lever crossing said supporting barand having a Weighted end at the side of said bar opposite from thepivot 1 of said lever.

10. A tension device for a spindle driving tape in a spinning ortwisting frame comprising a supporting bar extending longitudinally ofthe machine, brackets mounted in adjacent pairs on said bar andextending therefrom in opposite directions, swinging hangers pivoted onsaid brackets, a guide pulley pivoted on each hanger, and a weightedlever pivoted on each bracket, each hanger and associated lever beingmounted on the same bracket and having coacting extensions engagingbetween their pivots and Which render v said parts effective to moveeach pulley to take up slack when engaging a non-driving run of saidtape, each lever crossing said supporting bar and having a Weighted endat the side of said bar opposite from the pivot of said lever, and eachbracket having a stop eiTective to limit swinging movement of itsassociated hanger and pulley in both directions.

FRED K. HENDRICKSON.

